src/svg/qsvghandler_p.h
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     1 /****************************************************************************
       
     2 **
       
     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
     4 ** All rights reserved.
       
     5 ** Contact: Nokia Corporation (qt-info@nokia.com)
       
     6 **
       
     7 ** This file is part of the QtSvg module of the Qt Toolkit.
       
     8 **
       
     9 ** $QT_BEGIN_LICENSE:LGPL$
       
    10 ** No Commercial Usage
       
    11 ** This file contains pre-release code and may not be distributed.
       
    12 ** You may use this file in accordance with the terms and conditions
       
    13 ** contained in the Technology Preview License Agreement accompanying
       
    14 ** this package.
       
    15 **
       
    16 ** GNU Lesser General Public License Usage
       
    17 ** Alternatively, this file may be used under the terms of the GNU Lesser
       
    18 ** General Public License version 2.1 as published by the Free Software
       
    19 ** Foundation and appearing in the file LICENSE.LGPL included in the
       
    20 ** packaging of this file.  Please review the following information to
       
    21 ** ensure the GNU Lesser General Public License version 2.1 requirements
       
    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
       
    23 **
       
    24 ** In addition, as a special exception, Nokia gives you certain additional
       
    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception
       
    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
       
    27 **
       
    28 ** If you have questions regarding the use of this file, please contact
       
    29 ** Nokia at qt-info@nokia.com.
       
    30 **
       
    31 **
       
    32 **
       
    33 **
       
    34 **
       
    35 **
       
    36 **
       
    37 **
       
    38 ** $QT_END_LICENSE$
       
    39 **
       
    40 ****************************************************************************/
       
    41 
       
    42 #ifndef QSVGHANDLER_P_H
       
    43 #define QSVGHANDLER_P_H
       
    44 
       
    45 //
       
    46 //  W A R N I N G
       
    47 //  -------------
       
    48 //
       
    49 // This file is not part of the Qt API.  It exists purely as an
       
    50 // implementation detail.  This header file may change from version to
       
    51 // version without notice, or even be removed.
       
    52 //
       
    53 // We mean it.
       
    54 //
       
    55 
       
    56 #include "QtXml/qxmlstream.h"
       
    57 
       
    58 #ifndef QT_NO_SVG
       
    59 
       
    60 #include "QtCore/qhash.h"
       
    61 #include "QtCore/qstack.h"
       
    62 #include "qsvgstyle_p.h"
       
    63 #include "private/qcssparser_p.h"
       
    64 #include "private/qsvggraphics_p.h"
       
    65 
       
    66 QT_BEGIN_NAMESPACE
       
    67 
       
    68 class QSvgNode;
       
    69 class QSvgTinyDocument;
       
    70 class QSvgHandler;
       
    71 class QColor;
       
    72 class QSvgStyleSelector;
       
    73 class QXmlStreamReader;
       
    74 
       
    75 struct QSvgCssAttribute
       
    76 {
       
    77     QXmlStreamStringRef name;
       
    78     QXmlStreamStringRef value;
       
    79 };
       
    80 
       
    81 class QSvgHandler
       
    82 {
       
    83 public:
       
    84     enum LengthType {
       
    85         LT_PERCENT,
       
    86         LT_PX,
       
    87         LT_PC,
       
    88         LT_PT,
       
    89         LT_MM,
       
    90         LT_CM,
       
    91         LT_IN,
       
    92         LT_OTHER
       
    93     };
       
    94 
       
    95 public:
       
    96     QSvgHandler(QIODevice *device);
       
    97     QSvgHandler(const QByteArray &data);
       
    98     QSvgHandler(QXmlStreamReader *const data);
       
    99     ~QSvgHandler();
       
   100 
       
   101     QSvgTinyDocument *document() const;
       
   102 
       
   103     inline bool ok() const {
       
   104         return document() != 0 && !xml->hasError();
       
   105     }
       
   106 
       
   107     inline QString errorString() const { return xml->errorString(); }
       
   108     inline int lineNumber() const { return xml->lineNumber(); }
       
   109 
       
   110     void setDefaultCoordinateSystem(LengthType type);
       
   111     LengthType defaultCoordinateSystem() const;
       
   112 
       
   113     void pushColor(const QColor &color);
       
   114     void pushColorCopy();
       
   115     void popColor();
       
   116     QColor currentColor() const;
       
   117 
       
   118     void setInStyle(bool b);
       
   119     bool inStyle() const;
       
   120 
       
   121     QSvgStyleSelector *selector() const;
       
   122 
       
   123     void setAnimPeriod(int start, int end);
       
   124     int animationDuration() const;
       
   125 
       
   126     void parseCSStoXMLAttrs(QString css, QVector<QSvgCssAttribute> *attributes);
       
   127 
       
   128     inline QPen defaultPen() const
       
   129     { return m_defaultPen; }
       
   130 
       
   131 public:
       
   132     bool startElement(const QString &localName, const QXmlStreamAttributes &attributes);
       
   133     bool endElement(const QStringRef &localName);
       
   134     bool characters(const QStringRef &str);
       
   135     bool processingInstruction(const QString &target, const QString &data);
       
   136 
       
   137 private:
       
   138     void init();
       
   139 
       
   140     QSvgTinyDocument *m_doc;
       
   141     QStack<QSvgNode*> m_nodes;
       
   142 
       
   143     QList<QSvgNode*>  m_resolveNodes;
       
   144 
       
   145     enum CurrentNode
       
   146     {
       
   147         Unknown,
       
   148         Graphics,
       
   149         Style
       
   150     };
       
   151     QStack<CurrentNode> m_skipNodes;
       
   152 
       
   153     /*!
       
   154         Follows the depths of elements. The top is current xml:space
       
   155         value that applies for a given element.
       
   156      */
       
   157     QStack<QSvgText::WhitespaceMode> m_whitespaceMode;
       
   158 
       
   159     QSvgRefCounter<QSvgStyleProperty> m_style;
       
   160 
       
   161     LengthType m_defaultCoords;
       
   162 
       
   163     QStack<QColor> m_colorStack;
       
   164     QStack<int>    m_colorTagCount;
       
   165 
       
   166     bool m_inStyle;
       
   167 
       
   168     QSvgStyleSelector *m_selector;
       
   169 
       
   170     int m_animEnd;
       
   171 
       
   172     QXmlStreamReader *const xml;
       
   173     QCss::Parser m_cssParser;
       
   174     void parse();
       
   175     void resolveGradients(QSvgNode *node);
       
   176 
       
   177     QPen m_defaultPen;
       
   178     /**
       
   179      * Whether we own the variable xml, and hence whether
       
   180      * we need to delete it.
       
   181      */
       
   182     const bool m_ownsReader;
       
   183 };
       
   184 
       
   185 QT_END_NAMESPACE
       
   186 
       
   187 #endif // QT_NO_SVG
       
   188 #endif // QSVGHANDLER_P_H